Create IR_receiver_02.ino

A dedicated receiver sketch, based on this tutorial, for the Adafruit Mini Remote Control or an 4ppl3 IR remote (old school) using the Adafruit IR sensor TSOP38238.

It's  less general but easier to use if you only want to receive the keys individually to switch something.  It even runs on a space starved Arduino NG with an Atmega168 on 16 kB of RAM.